Reciprocal Equations (Beyond Syllabus)

Solve the following equation: $x^4-10x^3+26x^2-10x+1=0$.

Let the roots of the equation $E_1=x^3+x^2+lx+n=0$ be $x_i,(i=1,2,3)$ and the roots of $E_2=x^3+a{x}^2+bx+c=0$ be $\frac{x_i-1}{2}.$ If the equation $E_2=0$ is a reciprocal equation of class one, then the roots of these two equations excluding the common roots are

Cotyledons are also called-

Which kind of attractive forces are likely to be holding particles together in a substance that melts at $681 °\mathrm{C}$ and that conducts electricity when molten but not when solid?